. >>> jane thornton is head of climate earth and an environment lawyer and joins us from london. good to have you with us. what do you make. agreement reached? is it ambitious enough given the optimism that there was? >> well, it's important to recognise that a global climate change agreement is the hardest thing the world has will tried to do. so in lima the first block was put in place, which is that now almost 200 countries agreed that they may make substantial greenhouse gas emission cuts. that's the first time this has happened. china, the united states and india were never agreeing the cuts. they have agreed the cuts. everywhere is in the new, agreeing in principle on what needs to go forward. things are moving rapidly. does work need to be done before the paris agreement. of course. it's important to see how much movement has been made here. in 2009, and the end of the copenhagen meeting, the world was depressed as to whether agreement could be reached. here we are seeing a building block. >> a sticking block before reaching the agreement is developing nations not wanting